#include <stdio.h>

int Sum(int s, int e)
{
		int result = 0;
    int i = s;
		for(; i <= e; i++)
		{
			result += i;
		}
			return result;
}
		
int main()
{
		int start = 1;
		int end = 100;
		printf("I will begin\n");
		int n = Sum(start, end);
		printf("running done, result is: [%d-%d]=%d\n", start, end, n);
		return 0;
}
